MUSICAL INSTRUMENT, GRAND PIANO, AND UPRIGHT PIANO

摘要

PROBLEM TO BE SOLVED: To improve acoustic characteristics of a keyboard instrument like a grand piano or an upright piano.SOLUTION: An acoustic structure 1 integrated with a large roof 15 of an enclosure 11 of a grand piano 10 is put on a surface directed to a space in the enclosure 11. The acoustic structure 1 has pipes 2-m (m=1 to 9) like angular cylinders arranged in a direction orthogonal to a lengthwise direction. The pipes 2-m are like angular cylinders. Openings are provided in side surfaces fixed to the large roof 15 of the pipes 2-m and opposite surfaces UW. Positions of openings in the side surfaces UW of the pipes 2-m are different by pipes. When the large roof 15 of the grand piano 10 is closed, the acoustic structure 1 is housed in the enclosure.